#include<stdio.h>
#include "sub.h"
#include "add.h"
void main()
{
int a=15,b=3,c;
printf("test multiple file compile!");
c=add(a,b);
printf("%d+%d=%d\n",a,b,c);
c=sub(a,b);
printf("%d-%d=%d\n",a,b,c);


}
